• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

old and new school of output transformer winding

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50AE

50AE

Member
Joined 2011
Hi,

It is completely normal to occur under load. Outer layers have higher mean turn length and that translates into higher Rdc and higher leakage inductance. Leakage inductance cause will be more apparent at higher frequencies.

However without load and low frequencies, it would not be normal.
 
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